IPv4 Subnet Calculator

This calculator and tool allows you to type an IP address in and get information on a particular subnet. Enter an IP or range in CIDR notation.

Network: 247.0.2.128/25
Addresses: 128 (2⁷)
First IP: 247.0.2.128 (128.2.0.247.in-addr.arpa)
Last IP: 247.0.2.255 (255.2.0.247.in-addr.arpa)

Owned By: IANA (Reserved (Future Use))
/8 Operated By: IANA (Reserved (Future Use))

Related Networks

247.0.0.0/8
246.0.0.0/8
248.0.0.0/8
247.0.2.0/24
247.0.2.128/32
247.0.2.255/32

You can also use some of the other examples such as:

0.0.0.0/0
1.0.0.0/8
127.0.0.1
30.0.0.0/8
192.168.0.0/16